Good looking 686. I traded for a 4" 681 awhile back, and have been very happy with it. It shoots well, and to point of aim with most .357s. I know it sounds backwards, but I really like the no-snag, fixed sights on the 681 better than those on the 686.
Have fun with the 686 and don't be timid about running full house 357s through it-that's what the L frame is made for.!!!